How several moles of Pb Metal would form when the PbCO3 is heated?

There is PbCO3 Pure cerusitte and we are determining how many moles are there near in 7.5g of the starting material..I catch 35.6 moles..The next question is .....How tons moles of Pb Metal would form when the PbCO3 is heated?
Answers:
1) How many moles are there contained by 7.5 gram of PbCO3 ?
1 mol of PbCO3 is 207.2 + 12.01 + 3*16.00 = 267.2 gram
7.5 gram = 7.5 g / 267.2 g/mol = 0.0281 moles.

2) For every molecule of PbCO3 one atom of Pb is formed. There are therefore as many moles of Pb as mole of PbCO3, to be precise 0.0281 moles.

3) How many grams of lead are formed?
0.0281 moles = 0.0281 moles x 207.2 g/mol = 5.82 g

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